Carbon and its Compounds - 2024-2025 Past Paper PDF

4. Explain the nature of the covalent bond using the bond formation in CH3Cl. 5. Draw the electron dot structures for (a) ethanoic acid. (b) H2S. (c) propanone. (d) F2. 6. What is an homologous series? Explain with an example. 7. How can...

4. Explain the nature of the covalent bond using the bond formation in CH3Cl. 5. Draw the electron dot structures for (a) ethanoic acid. (b) H2S. (c) propanone. (d) F2. 6. What is an homologous series? Explain with an example. 7. How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties? 8. Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also? 9. Why are carbon and its compounds used as fuels for most applications? 10. Explain the formation of scum when hard water is treated with soap. 11. What change will you observe if you test soap with litmus paper (red and blue)? 12. What is hydrogenation? What is its industrial application? 13. Which of the following hydrocarbons undergo addition reactions: C2H6, C3H8, C3H6, C2H2 and CH4. 14. Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons. 15. Explain the mechanism of the cleaning action of soaps. Group Activity I Use molecular model kits to make models of the compounds you have learnt in this Chapter. II n Take about 20 mL of castor oil/cotton seed oil/linseed oil/soyabean oil in a beaker. Add 30 mL of 20 % sodium hydroxide solution. Heat the mixture with continuous stirring for a few minutes till the mixture thickens. Add 5-10 g of common salt to this. Stir the mixture well and allow it to cool. n You can cut out the soap in fancy shapes. You can also add perfume to the soap before it sets. 78 Science 2024-25